What is stuttering all about?

Hi there, im now turning 16 and i suffer from stuttering where i most of the times stutter like in public, school etc. This is a speech disorder where the nervs=es from the brains just dont send the messesges to talk properly or they get inturupted. Ive been stuttering for around 8 years now its gets better but than comes back but now soon im goin to do a 5 day intensive stuttering program which i hope will work and i'll less stutter hopefully.